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* bpo-38535: Fix positions for AST nodes for calls without arguments in ↵Serhiy Storchaka2019-10-261-2/+4
| | | | decorators. (GH-16861)
* Cut disused recode_encoding logic in _PyBytes_DecodeEscape. (GH-16013)Greg Price2019-09-121-1/+1
| | | | | | | | | | | | | | | | | | | | | All call sites pass NULL for `recode_encoding`, so this path is completely untested. That's been true since before Python 3.0. It adds significant complexity to this logic, so it's best to take it out. All call sites now have a literal NULL, and that's been true since commit 768921cf3 eliminated a conditional (`foo ? bar : NULL`) at the call site in Python/ast.c where we're parsing a bytes literal. But even before then, that condition `foo` had been a constant since unadorned string literals started meaning Unicode, in commit 572dbf8f1 aka v3.0a1~1035 . The `unicode` parameter is already unused, so mark it as unused too. The code that acted on it was also taken out before Python 3.0, in commit 8d30cc014 aka v3.0a1~1031 . The function (PyBytes_DecodeEscape) is exposed in the API, but it's never been documented.
* bpo-38138: Fix memory leak introduced by interned strings (GH-16053)Dino Viehland2019-09-121-0/+1
| | | | | | | | | | | Interned string needs to be decref'd https://bugs.python.org/issue38138 Automerge-Triggered-By: @matrixise
* bpo-38113: Update Python/ast.c to PEP-384 (GH-15975)Dino Viehland2019-09-111-4/+3
| | | | | | | | | | Removes statics for better subinterpreter support and moves to _PyType_Name https://bugs.python.org/issue38113 Automerge-Triggered-By: @tiran
* Fix typos mostly in comments, docs and test names (GH-15209)Min ho Kim2019-08-301-1/+1
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* bpo-32912: Revert SyntaxWarning on invalid escape sequences. (GH-15195)Gregory P. Smith2019-08-101-3/+3
| | | | | | | | | | | | | | | | | | DeprecationWarning will continue to be emitted for invalid escape sequences in string and bytes literals just as it did in 3.7. SyntaxWarning may be emitted in the future. But per mailing list discussion, we don't yet know when because we haven't settled on how to do so in a non-disruptive manner. (Applies 4c5b6bac2408f879231c7cd38d67657dd4804e7c to the master branch). (This is https://github.com/python/cpython/pull/15142 for master/3.9) https://bugs.python.org/issue32912 Automerge-Triggered-By: @gpshead
* Fix typos in comments, docs and test names (#15018)Min ho Kim2019-07-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | * Fix typos in comments, docs and test names * Update test_pyparse.py account for change in string length * Apply suggestion: splitable -> splittable Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Apply suggestion: splitable -> splittable Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Apply suggestion: Dealloccte -> Deallocate Co-Authored-By: Terry Jan Reedy <tjreedy@udel.edu> * Update posixmodule checksum. * Reverse idlelib changes.
* bpo-37593: Swap the positions of posonlyargs and args in the constructor of ↵Pablo Galindo2019-07-141-1/+1
| | | | | ast.parameters nodes (GH-14778) https://bugs.python.org/issue37593
* bpo-18374: fix wrong col_offset of some ast.BinOp instances (GH-14607)Carl Friedrich Bolz-Tereick2019-07-081-1/+1
| | | | | Nested BinOp instances (e.g. a+b+c) had a wrong col_offset for the second BinOp (e.g. 2 instead of 0 in the example). Fix it by using the correct st node to copy the line and col_offset from in ast.c.
* remove dead code (GH-14104)David Carlier2019-06-181-3/+0
| | | default case ought to handle the "unexpected".
* bpo-37253: Add _PyCompilerFlags_INIT macro (GH-14018)Victor Stinner2019-06-131-2/+1
| | | | | Add a new _PyCompilerFlags_INIT macro to initialize PyCompilerFlags variables, rather than initializing cf_flags and cf_feature_version explicitly in each variable.
* bpo-35814: Allow unpacking in r.h.s of annotated assignment expressions ↵Pablo Galindo2019-06-031-1/+1
| | | | (GH-13760)
* bpo-37112: Allow compile to work on AST with positional only arguments with ↵Pablo Galindo2019-05-311-1/+1
| | | | defaults (GH-13697)
* bpo-37070: Cleanup fstring debug handling (GH-13607)Eric V. Smith2019-05-291-27/+18
| | | | * Clean up some comments, fix potential memory leaks, clarify literal and expr_text.
* bpo-37072: Fix crash in PyAST_FromNodeObject() when flags is NULL (#13634)Guido van Rossum2019-05-281-1/+1
| | | | | I'm confident that this fixes the reported crash. flags=NULL is treated as using the latest minor version. https://bugs.python.org/issue37072
* bpo-37050: Remove expr_text from FormattedValue ast node, use Constant node ↵Eric V. Smith2019-05-271-44/+46
| | | | | instead (GH-13597) When using the "=" debug functionality of f-strings, use another Constant node (or a merged constant node) instead of adding expr_text to the FormattedValue node.
* bpo-36878: Track extra text added to 'type: ignore' in the AST (GH-13479)Michael J. Sullivan2019-05-221-1/+4
| | | | | GH-13238 made extra text after a # type: ignore accepted by the parser. This finishes the job and actually plumbs the extra text through the parser and makes it available in the AST.
* Fix couple of dead code paths (GH-7418)David Carlier2019-05-171-3/+0
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* bpo-36817: Do not decrement reference for expr_text on fstring = parsing ↵Pablo Galindo2019-05-121-1/+0
| | | | failure (GH-13256)
* bpo-36817: Fix reference leak for expr_text in f-string = parsing (GH-13249)Pablo Galindo2019-05-111-2/+7
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* bpo-36817: Add f-string debugging using '='. (GH-13123)Eric V. Smith2019-05-081-29/+83
| | | If a "=" is specified a the end of an f-string expression, the f-string will evaluate to the text of the expression, followed by '=', followed by the repr of the value of the expression.
* bpo-36540: PEP 570 -- Implementation (GH-12701)Pablo Galindo2019-04-291-18/+82
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This commit contains the implementation of PEP570: Python positional-only parameters. * Update Grammar/Grammar with new typedarglist and varargslist * Regenerate grammar files * Update and regenerate AST related files * Update code object * Update marshal.c * Update compiler and symtable * Regenerate importlib files * Update callable objects * Implement positional-only args logic in ceval.c * Regenerate frozen data * Update standard library to account for positional-only args * Add test file for positional-only args * Update other test files to account for positional-only args * Add News entry * Update inspect module and related tests
* bpo-36495: Fix two out-of-bounds array reads (GH-12641)Brad Larsen2019-04-011-2/+2
| | | Research and fix by @bradlarsen.
* bpo-36332: Allow compile() to handle AST objects with assignment expressions ↵Pablo Galindo2019-03-181-3/+4
| | | | | | (GH-12398)
* bpo-36280: Add Constant.kind field (GH-12295)Guido van Rossum2019-03-131-7/+46
| | | | | | | | | | | | | | The value is a string for string and byte literals, None otherwise. It is 'u' for u"..." literals, 'b' for b"..." literals, '' for "..." literals. The 'r' (raw) prefix is ignored. Does not apply to f-strings. This appears sufficient to make mypy capable of using the stdlib ast module instead of typed_ast (assuming a mypy patch I'm working on). WIP: I need to make the tests pass. @ilevkivskyi @serhiy-storchaka https://bugs.python.org/issue36280
* bpo-35975: Support parsing earlier minor versions of Python 3 (GH-12086)Guido van Rossum2019-03-071-19/+81
| | | | | | | This adds a `feature_version` flag to `ast.parse()` (documented) and `compile()` (hidden) that allow tweaking the parser to support older versions of the grammar. In particular if `feature_version` is 5 or 6, the hacks for the `async` and `await` keyword from PEP 492 are reinstated. (For 7 or higher, these are unconditionally treated as keywords, but they are still special tokens rather than `NAME` tokens that the parser driver recognizes.) https://bugs.python.org/issue35975
* bpo-36187: Remove NamedStore. (GH-12167)Serhiy Storchaka2019-03-051-109/+90
| | | | | NamedStore has been replaced with Store. The difference between NamedStore and Store is handled when precess the NamedExpr node one level upper.
* bpo-36052: Raise a SyntaxError when assigning a value to __debug__ with := ↵Stéphane Wirtel2019-02-211-1/+1
| | | | | | | (GH-11958) Trying to assign a value to __debug__ using the assignment operator is supposed to fail, but a missing check for forbidden names when setting the context in the ast was preventing this behaviour.
* bpo-36049: Fix compiler warning in Python/ast.c (GH-11949)Pablo Galindo2019-02-191-1/+1
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* bpo-35766 follow-up: Add an error check to new_type_comment() (#11766)Guido van Rossum2019-02-111-0/+2
| | | | If PyUnicode_DecodeUTF8() returns NULL, PyArena_AddPyObject() would crash. Found by @msullivan for https://github.com/python/typed_ast/pull/93.
* Fix compiler warning about non initialised variable (GH-11806)Pablo Galindo2019-02-101-2/+2
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* Fix compiler warnings about end_col_offset and end_lineno (GH-11735)Ivan Levkivskyi2019-02-101-5/+2
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* bpo-35879: Fix type comment leaks (GH-11728)Guido van Rossum2019-02-011-3/+8
| | | | | * Fix leak for # type: ignore * Fix the type comment leak
* bpo-35766: Merge typed_ast back into CPython (GH-11645)Guido van Rossum2019-01-311-58/+246
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* bpo-35814: Allow same r.h.s. in annotated assignments as in normal ones ↵Ivan Levkivskyi2019-01-251-1/+6
| | | | | | (GH-11667)
* bpo-35224: PEP 572 Implementation (#10497)Emily Morehouse2019-01-241-3/+97
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add tokenization of := - Add token to Include/token.h. Add token to documentation in Doc/library/token.rst. - Run `./python Lib/token.py` to regenerate Lib/token.py. - Update Parser/tokenizer.c: add case to handle `:=`. * Add initial usage of := in grammar. * Update Python.asdl to match the grammar updates. Regenerated Include/Python-ast.h and Python/Python-ast.c * Update AST and compiler files in Python/ast.c and Python/compile.c. Basic functionality, this isn't scoped properly * Regenerate Lib/symbol.py using `./python Lib/symbol.py` * Tests - Fix failing tests in test_parser.py due to changes in token numbers for internal representation * Tests - Add simple test for := token * Tests - Add simple tests for named expressions using expr and suite * Tests - Update number of levels for nested expressions to prevent stack overflow * Update symbol table to handle NamedExpr * Update Grammar to allow assignment expressions in if statements. Regenerate Python/graminit.c accordingly using `make regen-grammar` * Tests - Add additional tests for named expressions in RoundtripLegalSyntaxTestCase, based on examples and information directly from PEP 572 Note: failing tests are currently commented out (4 out of 24 tests currently fail) * Tests - Add temporary syntax test failure tests in test_parser.py Note: There is an outstanding TODO for this -- syntax tests need to be moved to a different file (presumably test_syntax.py), but this is covering what needs to be tested at the moment, and it's more convenient to run a single test for the time being * Add support for allowing assignment expressions as function argument annotations. Uncomment tests for these cases because they all pass now! * Tests - Move existing syntax tests out of test_parser.py and into test_named_expressions.py. Refactor syntax tests to use unittest * Add TargetScopeError exception to extend SyntaxError Note: This simply creates the TargetScopeError exception, it is not yet used anywhere * Tests - Update tests per PEP 572 Continue refactoring test suite: The named expression test suite now checks for any invalid cases that throw exceptions (no longer limited to SyntaxErrors), assignment tests to ensure that variables are properly assigned, and scope tests to ensure that variable availability and values are correct Note: - There are still tests that are marked to skip, as they are not yet implemented - There are approximately 300 lines of the PEP that have not yet been addressed, though these may be deferred * Documentation - Small updates to XXX/todo comments - Remove XXX from child description in ast.c - Add comment with number of previously supported nested expressions for 3.7.X in test_parser.py * Fix assert in seq_for_testlist() * Cleanup - Denote "Not implemented -- No keyword args" on failing test case. Fix PEP8 error for blank lines at beginning of test classes in test_parser.py * Tests - Wrap all file opens in `with...as` to ensure files are closed * WIP: handle f(a := 1) * Tests and Cleanup - No longer skips keyword arg test. Keyword arg test now uses a simpler test case and does not rely on an external file. Remove print statements from ast.c * Tests - Refactor last remaining test case that relied on on external file to use a simpler test case without the dependency * Tests - Add better description of remaning skipped tests. Add test checking scope when using assignment expression in a function argument * Tests - Add test for nested comprehension, testing value and scope. Fix variable name in skipped comprehension scope test * Handle restriction of LHS for named expressions - can only assign to LHS of type NAME. Specifically, restrict assignment to tuples This adds an alternative set_context specifically for named expressions, set_namedexpr_context. Thus, context is now set differently for standard assignment versus assignment for named expressions in order to handle restrictions. * Tests - Update negative test case for assigning to lambda to match new error message. Add negative test case for assigning to tuple * Tests - Reorder test cases to group invalid syntax cases and named assignment target errors * Tests - Update test case for named expression in function argument - check that result and variable are set correctly * Todo - Add todo for TargetScopeError based on Guido's comment (https://github.com/python/cpython/commit/2b3acd37bdfc2d35e5094228c6684050d2aa8b0a#r30472562) * Tests - Add named expression tests for assignment operator in function arguments Note: One of two tests are skipped, as function arguments are currently treating an assignment expression inside of parenthesis as one child, which does not properly catch the named expression, nor does it count arguments properly * Add NamedStore to expr_context. Regenerate related code with `make regen-ast` * Add usage of NamedStore to ast_for_named_expr in ast.c. Update occurances of checking for Store to also handle NamedStore where appropriate * Add ste_comprehension to _symtable_entry to track if the namespace is a comprehension. Initialize ste_comprehension to 0. Set set_comprehension to 1 in symtable_handle_comprehension * s/symtable_add_def/symtable_add_def_helper. Add symtable_add_def to handle grabbing st->st_cur and passing it to symtable_add_def_helper. This now allows us to call the original code from symtable_add_def by instead calling symtable_add_def_helper with a different ste. * Refactor symtable_record_directive to take lineno and col_offset as arguments instead of stmt_ty. This allows symtable_record_directive to be used for stmt_ty and expr_ty * Handle elevating scope for named expressions in comprehensions. * Handle error for usage of named expression inside a class block * Tests - No longer skip scope tests. Add additional scope tests * Cleanup - Update error message for named expression within a comprehension within a class. Update comments. Add assert for symtable_extend_namedexpr_scope to validate that we always find at least a ModuleScope if we don't find a Class or FunctionScope * Cleanup - Add missing case for NamedStore in expr_context_name. Remove unused var in set_namedexpr_content * Refactor - Consolidate set_context and set_namedexpr_context to reduce duplicated code. Special cases for named expressions are handled by checking if ctx is NamedStore * Cleanup - Add additional use cases for ast_for_namedexpr in usage comment. Fix multiple blank lines in test_named_expressions * Tests - Remove unnecessary test case. Renumber test case function names * Remove TargetScopeError for now. Will add back if needed * Cleanup - Small comment nit for consistency * Handle positional argument check with named expression * Add TargetScopeError exception definition. Add documentation for TargetScopeError in c-api docs. Throw TargetScopeError instead of SyntaxError when using a named expression in a comprehension within a class scope * Increase stack size for parser by 200. This is a minimal change (approx. 5kb) and should not have an impact on any systems. Update parser test to allow 99 nested levels again * Add TargetScopeError to exception_hierarchy.txt for test_baseexception.py_ * Tests - Major update for named expression tests, both in test_named_expressions and test_parser - Add test for TargetScopeError - Add tests for named expressions in comprehension scope and edge cases - Add tests for named expressions in function arguments (declarations and call sites) - Reorganize tests to group them more logically * Cleanup - Remove unnecessary comment * Cleanup - Comment nitpicks * Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0) - Add check for LHS types to detect a parenthesis then a name (see note) - Add test for this scenario - Update tests for changed error message for named assignment to a tuple (also, see note) Note: This caused issues with the previous error handling for named assignment to a LHS that contained an expression, such as a tuple. Thus, the check for the LHS of a named expression must be changed to be more specific if we wish to maintain the previous error messages * Cleanup - Wrap lines more strictly in test file * Revert "Explicitly disallow assignment expressions to a name inside parentheses, e.g.: ((x) := 0)" This reverts commit f1531400ca7d7a2d148830c8ac703f041740896d. * Add NEWS.d entry * Tests - Fix error in test_pickle.test_exceptions by adding TargetScopeError to list of exceptions * Tests - Update error message tests to reflect improved messaging convention (s/can't/cannot) * Remove cases that cannot be reached in compile.c. Small linting update. * Update Grammar/Tokens to add COLONEQUAL. Regenerate all files * Update TargetScopeError PRE_INIT and POST_INIT, as this was purposefully left out when fixing rebase conflicts * Add NamedStore back and regenerate files * Pass along line number and end col info for named expression * Simplify News entry * Fix compiler warning and explicity mark fallthrough
* bpo-33416: Add end positions to Python AST (GH-11605)Ivan Levkivskyi2019-01-221-94/+252
| | | | | | | | | | | | | | | | | | The majority of this PR is tediously passing `end_lineno` and `end_col_offset` everywhere. Here are non-trivial points: * It is not possible to reconstruct end positions in AST "on the fly", some information is lost after an AST node is constructed, so we need two more attributes for every AST node `end_lineno` and `end_col_offset`. * I add end position information to both CST and AST. Although it may be technically possible to avoid adding end positions to CST, the code becomes more cumbersome and less efficient. * Since the end position is not known for non-leaf CST nodes while the next token is added, this requires a bit of extra care (see `_PyNode_FinalizeEndPos`). Unless I made some mistake, the algorithm should be linear. * For statements, I "trim" the end position of suites to not include the terminal newlines and dedent (this seems to be what people would expect), for example in ```python class C: pass pass ``` the end line and end column for the class definition is (2, 8). * For `end_col_offset` I use the common Python convention for indexing, for example for `pass` the `end_col_offset` is 4 (not 3), so that `[0:4]` gives one the source code that corresponds to the node. * I added a helper function `ast.get_source_segment()`, to get source text segment corresponding to a given AST node. It is also useful for testing. An (inevitable) downside of this PR is that AST now takes almost 25% more memory. I think however it is probably justified by the benefits.
* bpo-16806: Fix `lineno` and `col_offset` for multi-line string tokens (GH-10021)Anthony Sottile2019-01-131-3/+7
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* bpo-35494: Improve syntax error messages for unbalanced parentheses in ↵Serhiy Storchaka2019-01-121-4/+27
| | | | f-string. (GH-11161)
* bpo-35436: Add missing PyErr_NoMemory() calls and other minor bug fixes. ↵Zackery Spytz2018-12-071-1/+6
| | | | | | (GH-11015) Set MemoryError when appropriate, add missing failure checks, and fix some potential leaks.
* bpo-31241: Fix AST node position for list and generator comprehensions. ↵Serhiy Storchaka2018-11-271-17/+32
| | | | | | | | (GH-10633) The lineno and col_offset attributes of AST nodes for list comprehensions, generator expressions and tuples are now point to the opening parenthesis or square brace. For tuples without parenthesis they point to the position of the first item.
* bpo-18407: ast.c uses Py_ssize_t for asdl_seq_LEN() iterator (GH-10655)Victor Stinner2018-11-221-9/+9
| | | | | | | When iterating using asdl_seq_LEN(), use 'Py_ssize_t' type instead of 'int' for the iterator variable, to avoid downcast on 64-bit platforms. _Py_asdl_int_seq_new() now also ensures that the index is greater than or equal to 0.
* bpo-35169: Improve error messages for forbidden assignments. (GH-10342)Serhiy Storchaka2018-11-201-60/+46
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* bpo-34876: Change the lineno of the AST for decorated function and class. ↵Serhiy Storchaka2018-10-301-6/+0
| | | | | | | (GH-9731) It was overridden by the lineno of the first decorator. Now it is the lineno of 'def' or 'class'.
* bpo-32912: Replace a DeprecationWarning with a SyntaxWarning (GH-9652)Serhiy Storchaka2018-10-191-3/+3
| | | | for invalid escape sequences in string and bytes literals.
* bpo-32892: Use ast.Constant instead of specific constant AST types. (GH-9445)Serhiy Storchaka2018-09-271-54/+28
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* bpo-34683: Make SyntaxError column offsets consistently 1-indexed (gh-9338)Ammar Askar2018-09-241-1/+1
| | | | | | Also point to start of tokens in parsing errors. Fixes bpo-34683
* closes bpo-34641: Further restrict the LHS of keyword argument function call ↵Benjamin Peterson2018-09-131-14/+41
| | | | syntax. (GH-9212)
* Make sure the line comes from the same node as the col offset. (GH-9189)Benjamin Peterson2018-09-111-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Followup to 90fc8980bbcc5c7dcced3627fe172b0bfd193a3b. <!-- Thanks for your contribution! Please read this comment in its entirety. It's quite important. # Pull Request title It should be in the following format: ``` bpo-NNNN: Summary of the changes made ``` Where: bpo-NNNN refers to the issue number in the https://bugs.python.org. Most PRs will require an issue number. Trivial changes, like fixing a typo, do not need an issue. # Backport Pull Request title If this is a backport PR (PR made against branches other than `master`), please ensure that the PR title is in the following format: ``` [X.Y] <title from the original PR> (GH-NNNN) ``` Where: [X.Y] is the branch name, e.g. [3.6]. GH-NNNN refers to the PR number from `master`. -->
* closes bpo-31902: Fix the col_offset attribute for ast.Async* nodes to point ↵guoci2018-09-111-18/+21
| | | | | | to the "async" keyword. (GH-4175) Previously, col_offset points to the keyword after "async".
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